Window-screen.



H.l BAUKNECHT.

WINDOW SCREEN. APPUcA'TIoN FILED Nov. t3 1916.

Patented June 12, 1917.

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HENRY BAUKNECHT, 0F MDLAND, MICHIGAN.

WINDOW-SCREEN.

Specification of Letters Patent.

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Application filed November 13, 1916. Serial No. 131,029.

- a full, clear, and exact description of the invention, such as will enable others skilled in the art to which 1t appertains to make and use the same.

ihrs invention relates to window screens,

land has particular reference to adjustable screens.

The object of this invention is to provide a window screen which is adjustable, but which only spreads one screen section across the window space.' It is well known that most adjustable or expansible window screens are formed of relatively slidable sections of similar or identical construction, so that when the screen is mounted in a window frame, the sections overlap through a iniddlevportion, so that the screen appears in doubled relation and the vertical bars or sides of the over-lapping sections also tend to obstruct the view. My invention avoids this objectionable feature by providing a screen consisting` of slidable frame sections, but a single extensible expanse of screening. 1n carrying out the invention, one of the slidable frame sections is provided with a roller upon which the unexpanded portion of the screen is rolled, the screen being drawn upon the roller as the frame sections are brought together.

lilith the above objects in view and such other objects as may hereinafter appear, my invention will now be fully set forth and described, reference being had to the accompanying drawings.

In the drawings:

Figure 1 is an elevation of the screen,

Fig. 2 is an enlarged elevation of the framing at one side which forms an inclosure for the roller, certain parts being broken away and others sectioned for the saire of clearness,

Fig. 3 is a section on line 3-8 of Fig. 1 and Fig. 4 is a detail view of a locking device used in connection with the invention.

Referring more particularly to the drawings 1 and 2 respectively indicate the end sections of the screen which are joined by the intermediate sections 3,- lEa/Ch of the se@ tions, 1, 2 and 8 is formed of channeled material, and the end sections consist of the vertical channels 4 and the horizontal arms 5, the latter extending toward one another from the upper and lower ends of the verti- ;al elements 4 and being received in the channeled members 3. r1`he channeled mem bers or sections 8 are provided along their free edges with the inturned walls 7 which form a contracted passage 8 along the open side of the channel sections. The vertical element 4 of the section 1 constitutes a casing for a spring roller 9 whose upper and lower ends are provided with journals 10 mounted in the bearing plates 11, secured within the opposite ends of the casing. The upper and lower ends of the roller 9 also carry the pinions 12 which are fixed upon the roller and extend through slots 18 formed in one. side of the roller casing or element 4. The roller 9 carries a sheet or strip of screening 14, and is controlled after the manner of the usual spring curtain roller, so that the normal tendency of the roller is to wind up the screen 14 whose free end is fixed within the channeled element 4 of the sections 2. The portions of the pinions 12 which extend beyond the side of the casing 4 are engaged by the pawls or lugs 15 which are mounted upon the upper and lower ends ot abowed leaf spring 16 mounted upon the outer face of the casing 4. Said spring 1G is bowed along its middle portion, and where it contacts with the casing 4 at opposite ends of the bowed portion, passes through the guide wings 17, and is thereby held in position. Pressure upon the middle bowed portion of the spring 16 fulcrums the spring upon the loops 17 and causes the pawls 15 to rise out of engagement with the pinions 12, thereby releasing the spring roller. Thus, the spring 16 with its pawls 15 acts as the normal lock for the roller.

The upper and lower edges of the screen 14 extend into the channeled portions of the arms 5 and in the sections 3, so that it is fully extended, and completely closes vthe opening formed by the sections. It is obvious that the narrowest folded limit of the screen is determined by the length of the sections 3 and the corner plates 18 which are secured across the corners of the sections 1 and 2, and the edges of the screening 14 which do not come into position to be rolled upon the roller 9 are bound with suitable binding strips 19, the latter assisting in lling the channeled portions of the sections, and stiifening the screening material yso that it rwill not bulge out of the'upper and lower portions of the sections.

Extending from the corners of the sections 2 to the adjacent ends of the sections 3 are the locking devices 20.y Each of the locking devices 20 consists of a pair of pivoted arms whose free ends are pivotally connected as above stated to the sections 2 and 3, and whose joined yends are provided with the overturned locking lugs 21 which bear upon the opposing arms when the latter are extended. Stop devices 22 are provided on the marginal faces of the members 5 to de termine the minimum limit of the contraction of the screen.

In the use of my improved screen, the device is adjusted approximately to the width of the window in which the screen is to be placed, the spring 16 being released .from contact with the pinio'ns 12 so that the screening 14 may be extended or contracted,

the sections 1, 2 and 3 sliding relatively upon one another until the desired adjustment has been secured. The screen is then set within the window frame, and the locking devices length of screening mounted on the roller and secured within the opposing section, serrated locking wheels carried by the roller and extending beyond the sides of the sections, and a spring bar carried by the section and having its ends resiliently engaged in said wheels.

2. A folding screen, comprising in combination, opposing end sections and intermediate sections which are relatively slidable, a

roller carried by one of theY end sections, a Y

length of screening' mounted on the roller and secured within the opposing section, serrated locking wheels carried by the roller and extending beyondthe sides of the sec-y tion, a spring bar carried by the section and having its ends resiliently engaged in said wheels, and locking devices for expanding the parts into window engaging position.

In testimony whereof, laffix my signature, in the presence of two witnesses.

HENRY BAUKNECHT.

Witnesses:

MYRoN E. ADAMS, RosE STEFFEN.

Copies of this patent may be obtained for Vfive cents cach,y kby addressing the Commissioner o' Patents, Washington, D. C. 

